20884640

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{643}}^1$

素因数の和:694

約数の個数: 96

約数和(自身を含む): 58423680

約数和(自身を除く): 37539040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 32, 35, 40, 56, 58, 70, 80, 112, 116, 140, 145, 160, 203, 224, 232, 280, 290, 406, 464, 560, 580, 643, 812, 928, 1015, 1120, 1160, 1286, 1624, 2030, 2320, 2572, 3215, 3248, 4060, 4501, 4640, 5144, 6430, 6496, 8120, 9002, 10288, 12860, 16240, 18004, 18647, 20576, 22505, 25720, 32480, 36008, 37294, 45010, 51440, 72016, 74588, 90020, 93235, 102880, 130529, 144032, 149176, 180040, 186470, 261058, 298352, 360080, 372940, 522116, 596704, 652645, 720160, 745880, 1044232, 1305290, 1491760, 2088464, 2610580, 2983520, 4176928, 5221160, 10442320, 20884640]

約数ペア:

[(1, 20884640), (2, 10442320), (4, 5221160), (5, 4176928), (7, 2983520), (8, 2610580), (10, 2088464), (14, 1491760), (16, 1305290), (20, 1044232), (28, 745880), (29, 720160), (32, 652645), (35, 596704), (40, 522116), (56, 372940), (58, 360080), (70, 298352), (80, 261058), (112, 186470), (116, 180040), (140, 149176), (145, 144032), (160, 130529), (203, 102880), (224, 93235), (232, 90020), (280, 74588), (290, 72016), (406, 51440), (464, 45010), (560, 37294), (580, 36008), (643, 32480), (812, 25720), (928, 22505), (1015, 20576), (1120, 18647), (1160, 18004), (1286, 16240), (1624, 12860), (2030, 10288), (2320, 9002), (2572, 8120), (3215, 6496), (3248, 6430), (4060, 5144), (4501, 4640)]